Optics: measuring and testing – Of light reflection
Patent
1996-04-05
1998-08-04
Font, Frank G.
Optics: measuring and testing
Of light reflection
356369, G01N 2155, G01J 400
Patent
active
057902593
ABSTRACT:
Each of a detection sample object and a non-detection sample object is illuminated with S-polarization light, for instance. S-polarization light and P-polarization light reflected from each sample object are detected by different photodetecting elements. Glossiness values and light quantities of the detection and non-detection sample objects are judged based on detection outputs of the photodetecting elements, and a glossiness difference and a light quantity difference are calculated. An evaluation function having at least one of the glossiness and the light quantity as a variable is determined by using the glossiness difference and the light quantity difference. Thresholds for object discrimination are calculated based on evaluation function values of the detection and non-detection sample objects.
REFERENCES:
patent: 1949619 (1934-03-01), Pfund
patent: 5139339 (1992-08-01), Courtney et al.
Hosokawa Hayami
Inoue Hiroyuki
Ishikawa Nobuharu
Kurokawa Masahiro
Mizuhata Shinji
Font Frank G.
Merlino Amanda
Omron Corporation
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